Agricultural machine

Abstract

The present invention relates to an agricultural machine (1), in particular a tractor (2), with an engine compartment (10) and an engine hood (11). The engine hood (11) comprises a cover (12) and a frame structure (15), wherein the cover (12) includes at least one recess (13, 13.1, 13.2, 13.3) for arranging at least one functional element (14, 14.1, 14.2, 14.3). The agricultural machine (1) is characterized in that the cover (12) comprises at least one centering means (17, 17.1, 17.2, 17.3, 17.4) for the defined alignment and positioning of the functional means (14, 14.1, 14.2, 14.3) in the recess (13, 13.1, 13.2, 13.3), wherein the centering means (17, 17.1, 17.2, 17.3, 17.4) is arranged on at least one inner surface (18, 18.1, 18.2, 18.3) of the cover (12) in the edge region (R, R1, R2, R3) of the recess (13, 13.1, 13.2, 13.3).

Description

[0001] The present invention relates to an agricultural working machine according to the preamble of independent claim 1.

[0002] Agricultural machinery, such as tractors, is powered by a drive unit, for example, an internal combustion engine and / or one or more electric motors, which, along with other components required for the operation of the agricultural machinery, is located in an engine compartment. An engine hood is provided to cover the components located in the engine compartment. This protects the components from contamination and the operator from the engine and / or exhaust components, which heat up considerably during operation. At least parts of the engine hood are adjustable between a closed position, in which they enclose and thus protect the engine compartment and the components located therein, and an open position, in which they provide partial access to the components located in the engine compartment, for example, for maintenance purposes.The engine hood can include various recesses to direct airflow into the engine compartment for cooling the components located there, particularly the engine and exhaust systems, and to direct waste heat from the engine compartment to the surrounding environment. These recesses contain functional elements in the form of ventilation grilles. Furthermore, the engine hood typically includes additional recesses for lighting devices, such as work lights and / or driving lights. Thus, in addition to its protective function, the engine hood also serves to mount essential functional elements for the operation of the agricultural machine.

[0003] Such a conventional engine hood for an agricultural machine designed as a tractor, on which functional elements such as ventilation grilles and lighting devices are arranged, is known, for example, from EP 2 193 947 A1.

[0004] The arrangement and positioning of such functional elements within the designated recesses in the engine hood of agricultural machinery regularly presents a challenge. On the one hand, for operational reliability, particularly with lighting systems, it must be ensured that the functional elements assume a defined orientation and position within the recess so that one or more functions, for which the functional element is intended during operation of the agricultural machinery, are performed correctly. On the other hand, a defined orientation and positioning of the functional elements within the recesses is essential for an appealing visual appearance of the engine hood and thus of the agricultural machinery as a whole—an aspect that can significantly influence a customer's purchasing decision.For this purpose, the functional elements should be arranged or mounted centrally in the recesses with gaps that are as uniform and small as possible.

[0005] In addition to these requirements, the engine hood should also withstand the stresses occurring during the operation of the agricultural machinery, regardless of their nature, in order to ensure safe operation under a wide variety of environmental conditions. In particular, the engine hood must withstand, at least to a certain extent, stresses resulting from acceleration forces, wind speeds, and / or static loads during operation.

[0006] Based on this, the object of the present invention is therefore to design and further develop an agricultural machine in such a way that its engine hood ensures a consistently reliable, reproducible alignment and positioning of functional elements in the recesses provided for this purpose, as required for ensuring proper function and an appealing appearance of the agricultural machine, while at the same time being sufficiently able to withstand the loads occurring during the operation of the agricultural machine.

[0007] This problem is solved according to the invention by the features of independent claim 1, wherein advantageous further developments of the agricultural machinery according to the invention are the subject of the corresponding dependent claims 2 to 15.

[0008] Accordingly, the present invention relates to an agricultural machine, in particular a tractor, with an engine compartment and an engine hood that at least partially delimits the engine compartment. The engine hood comprises a cover and a frame structure, wherein the frame structure includes a first frame element, which is attached to at least one machine frame of the agricultural machine, and a second frame element, which supports at least parts of the cover. The first frame element and the second frame element are pivotably coupled to each other in a rear region of the engine hood. The cover includes at least one recess for arranging at least one functional element.The agricultural machine is characterized in that the cladding comprises at least one centering means for the defined alignment and positioning of the functional means in the recess, wherein the centering means is arranged on at least one inner surface of the cladding in the edge region of the recess.

[0009] The inventive design of the engine hood cover with at least one centering means makes it possible to overcome the challenges that arise when arranging and positioning a large number of functional elements in the corresponding recesses provided for this purpose in the engine hood cover. The centering element enables a defined alignment and positioning, which allows the respective functional element to function properly during operation of the agricultural machine – an aspect that is essential for the safe operation of the agricultural machine.

[0010] Furthermore, the centering element ensures an appealing visual appearance for the engine hood and thus for the agricultural machine as a whole, by centering the functional elements within the recess, resulting in uniform and minimal gaps. Positioning the centering element on an inner surface of the cover also prevents the operator from seeing it when facing the engine hood. Instead, the functional elements integrate seamlessly into the engine hood cover, eliminating the need for complex geometric shapes on the outer surface for alignment and positioning, thus creating a high-quality engine hood.

[0011] According to an advantageous embodiment of the invention, the cladding comprises a main cladding supported by the second frame element, which includes at least one recess in which at least one functional element designed as a lighting device is arranged.

[0012] According to an advantageous embodiment of the invention, the lighting device is a light strip and the recess is designed for arranging the light strip, wherein the main covering comprises at least one fastening structure for attaching the light strip to the main covering on an inner surface in the edge region of the recess, which is designed in the form of a cylindrical projection with a bore for receiving a fastening means, wherein the centering means is designed as at least one rib arranged on a circumferential surface of the projection.

[0013] Preferably, the lighting device is a cylindrical lighting device and the recess is designed for arranging the cylindrical lighting device, wherein the centering means is designed as a rib arranged on an inner surface of the main cladding defining a circumferential edge of the recess.

[0014] It is further preferably provided that the main cladding comprises at least one fastening structure for attaching the cylindrical lighting device to the main cladding on a further inner surface in the edge region of the recess, which is designed in the form of a cylindrical projection with a bore for receiving a fastening means, wherein the main cladding comprises at least one further centering means arranged on a circumferential surface of the projection, which is designed as a rib.

[0015] In particular, it is provided that the cylindrical lighting device comprises a ring element on which a light source arrangement is arranged, wherein the ring element comprises at least one positioning means designed as a rib on an outer circumferential edge, which cooperates with the centering means and / or the further centering means for the defined alignment and positioning of the cylindrical lighting device in the recess.

[0016] The creation of centering elements on various inner surfaces of the main fairing, at the edges of the different recesses for lighting devices, ensures that a wide variety of lighting devices can be arranged on the main fairing of the hood. Due to the different designs and positioning of the centering elements on the respective inner surfaces at the edges of each recess, these devices can have a wide variety of geometries and yet still be easily arranged with a defined orientation and position within the recess and thus on the main fairing. The various lighting devices simply need to be inserted into the respective recess from the inside.are inserted and brought into contact with the various inner surfaces of the main panel, whereby the correct defined alignment and positioning of the corresponding lighting device, which is essential for the fulfillment of the function and the appealing optical appearance, is automatically achieved during this process by means of the centering means on the main panel in the area of ​​the respective recess and the possible positioning means on the lighting devices and / or due to the shape of the lighting devices.

[0017] According to an advantageous embodiment of the invention, the recess receiving the light strip and the at least one recess receiving the cylindrical lighting device are formed one above the other in the area of ​​the main fairing which defines the front of the agricultural machine in the direction of vehicle height.

[0018] Preferably, the main paneling is interrupted in sections between the recesses which are arranged one above the other in the direction of vehicle height, with a stabilizing structure being arranged on the inside of the main paneling to bridge the interruption section by section.

[0019] The vertical positioning of the light bar and the cylindrical lighting units, aligned vertically with the vehicle, ensures optimal illumination of the area in front and / or to the sides, whether the agricultural machine is operating in a field or yard, or while driving on the road. Furthermore, the interruption in the main bodywork, and the stabilizing structure that bridges this interruption in sections, ensures a sufficient flow of air into the engine compartment for cooling the components, without compromising the overall load-bearing capacity of the engine hood or making the stabilizing structure visible to the operator.

[0020] According to an advantageous embodiment of the invention, the main fairing comprises a stiffening structure on an inner surface in the upper area of ​​the hood, thereby increasing the stiffness of the main fairing.

[0021] Preferably, the stiffening structure is designed as an integral part of the main cladding.

[0022] It is further preferably provided that the stiffening structure is rib-shaped.

[0023] In particular, it is intended that the dimensioning of the stiffening structure is based on the result of a calculation using a finite element method, taking into account possible load cases occurring in the operation of the agricultural machinery, preferably an acceleration load case, a wind speed load case and / or a static load case.

[0024] The stiffening structure on the inner surface of the main fairing in the upper area of ​​the engine hood ensures high stability of the main fairing and the engine hood as a whole. This allows the engine hood to withstand the forces exerted during operation of the agricultural machine, such as acceleration forces, wind speeds, and / or static loads, for example, when the operator climbs onto the hood to clean the cab. Furthermore, an integral, rib-shaped stiffening structure integrated with the main fairing allows for a simple and compact design of the frame element supporting the main fairing. This eliminates the need for large areas of the main fairing to be reinforced on the inside with additional stabilizing structures, particularly those made of metal.

[0025] According to an advantageous embodiment of the invention, a support structure is arranged between the second frame element and the main cladding in the coupling area of ​​the frame elements, wherein the support structure is attached to both the second frame element and the main cladding.

[0026] Preferably, the support structure is designed as at least one plate-shaped element.

[0027] It is particularly preferred that the support structure be designed as two plate-shaped elements.

[0028] The support structure ensures, in particular, that the hood is additionally stabilized in the coupling area of ​​the frame elements. This allows an operator to access this area for cleaning and / or maintenance work on the cab without the risk of the hood deforming or, in the worst case, being damaged by the operator's weight. Furthermore, the additional support structure prevents deformation of the main bodywork when the hood is opened or closed, as the hood is reinforced in the coupling area, i.e., where the first and second frame elements are pivotally connected.

[0029] According to an advantageous embodiment of the invention, the cladding comprises two side panels, each of which is attached to the first frame element and / or the machine frame, wherein each side panel includes at least one recess in which a functional element designed as a ventilation grille is arranged.

[0030] Preferably, the centering means is designed as a rib arranged on an inner surface of a respective side panel in the edge region of the recess, wherein a surface of the rib defining the orientation and positioning of the ventilation grille is aligned parallel to the edge of the recess.

[0031] The creation of centering elements on an inner surface of the side panel at the edge of the recess for a ventilation grille ensures that ventilation grilles of any geometric design can be arranged with a defined orientation and position within the recess and thus on the respective side panel. Here, too, the ventilation grilles simply need to be inserted or plugged into the respective recess from the inside and aligned with the various inner surfaces of the main panel. The centering element, and in particular the orientation of its surface, automatically achieves the correct, defined orientation and positioning of the corresponding lighting device during this process.

[0032] According to an advantageous embodiment of the invention, at least one fastening structure for attaching the side panel to the first frame element and / or the machine frame is arranged on an inner surface of a respective side panel in the edge region of the side panel, wherein the fastening structure comprises two webs arranged parallel to each other on the inner surface and a fastening means held by means of the webs, wherein the webs each have a raised section at one end, wherein the raised sections are formed at opposite ends of the webs, wherein the fastening means comprises a retaining section and a fastening section, wherein the retaining section is received in certain areas between the webs and the retaining section is secured to the webs by changing the orientation of the fastening means relative to the webs.

[0033] In particular, it is provided that the fastening section is designed in the form of a clamp.

[0034] The arrangement of fastening structures on the inside of the side panels ensures that the side panels can be detachably attached to the first frame element and / or the machine frame in a particularly simple manner. Furthermore, the special design of the fastening structures guarantees that the fastener can always be positioned with a defined orientation relative to the side panel, making the assembly of the side panels to the first frame element and / or the machine frame particularly straightforward, requiring minimal effort, yet with high precision.

[0035] The present invention is described in more detail below with reference to the embodiments illustrated in the figures.

[0036] They show: FIG. 1 a schematic and exemplary representation of an agricultural machine according to the invention in the form of a tractor; FIG. 2 a schematic and exemplary representation of an engine hood of the agricultural machine made of FIG. 1 ; FIG. 3 a schematic and exemplary representation of a recess for arranging a light strip in a main panel of the engine hood made of FIG. 2 ; FIG. 4 a schematic and exemplary representation of a in the edge area of ​​the recess made of FIG. 3 arranged centering means; FIG. 5 a schematic and exemplary representation of a recess for arranging a cylindrical lighting device in a main fairing of the engine hood made of FIG. 2with a ring element of the lighting device arranged therein; FIG. 6 a schematic and exemplary representation of a stiffening structure and a support structure of the engine hood; FIG. 7 a schematic and exemplary representation of a fastening structure for attaching a side panel of the engine hood made of FIG. 2 ; and FIG. 8 a schematic and exemplary representation of a recess for arranging a ventilation grille in a side panel of the engine hood made of FIG. 2 with a centering means arranged in the edge area of ​​the recess.

[0037] FIG. 1 Figure 1 shows an agricultural machine 1 according to the invention in the form of a tractor 2, wherein the basic structure of a tractor 2 is considered to be known to those skilled in the art. The tractor 2 can be spatially defined by three directions of extension, which are defined by a coordinate system in FIG. 1are indicated. The first extension direction is the longitudinal direction of the agricultural machine 1, hereinafter also referred to as the vehicle longitudinal direction FL, which runs in the x-axis direction; the second extension direction is the lateral direction of the agricultural machine 1, hereinafter also referred to as the vehicle lateral direction FB, which runs in the y-axis direction; and the third extension direction is the vertical direction of the agricultural machine 1, hereinafter also referred to as the vehicle vertical direction FH, which runs in the z-axis direction.

[0038] The tractor 2 comprises, among other things, a machine frame 3, ground engagement devices 4 assigned to a front axle 5 and a rear axle 6, and a cab 7 mounted on the machine frame 3. An operator 8 of the tractor 2 can be located in the cab 7 to control it. For this purpose, a control device 9 for operating and controlling the tractor 2, for example in the form of a steering wheel and / or joystick, is usually arranged inside the cab 7. To drive and provide the power required for operating the tractor 2, the tractor 2 has a drive unit (not shown in the figures), for example in the form of an internal combustion engine and / or one or more electric motors. A cooling system (not shown in the figures) can also be provided for the drive unit.Also not shown - a cooling unit may be provided, which may include, for example, a fan and a radiator for cooling the drive unit.

[0039] At least the drive unit and the cooling unit are arranged together in an engine compartment 10, the engine compartment 10 being at least partially bounded or enclosed by an engine hood 11. "At least partially bounded or enclosed" in this context means that one or more recesses 13 are formed in a panel 12 of the engine hood 11, which serve for the arrangement of functional elements 14, for example, lighting devices and / or ventilation grilles, on the engine hood 11. Furthermore, this also implies that certain areas of the engine compartment 10 may also be bounded or enclosed by the machine frame 3 and / or other structural components of the tractor 2.

[0040] A lighting device, preferably designed as a light bar 14.1, is arranged on the engine hood 11, wherein the cover 12 includes a recess 13.1 designed for accommodating the light bar 14.1. The light bar 14.1 can include a short-range work light, a long-range work light, and / or a daytime running light. Furthermore, one or more lighting devices, preferably designed as cylindrical lighting units 14.2, are preferably arranged on the engine hood 11, wherein the cover 12 includes one or more recesses 13.2 designed for accommodating the cylindrical lighting units 14.2. The cylindrical lighting units 14.2 can each include one or more lights for a parking light, a low beam, and / or a high beam. Additionally, one or more ventilation grilles 14.2 are preferably arranged on the engine hood 11.3 arranged, wherein the cover 12 includes one or more recesses 13.3 designed for the arrangement of the ventilation grilles 14.3. Air currents can flow into or out of the engine compartment 10 through the ventilation grilles 14.3.

[0041] The engine hood 11 comprises, in addition to the fairing 12, a frame structure 15. The frame structure 15 is designed in two parts. The frame structure 15 therefore comprises a first frame element (not shown in the figures) and a second frame element 16. The first frame element is attached at least to the machine frame 3 of the tractor 2, preferably bolted to the machine frame 3, but could also additionally be attached to a unit located in the engine compartment 10. The second frame element 16 supports at least parts of the fairing 12 of the engine hood 11. The first frame element and the second frame element 16 of the frame structure 15 of the engine hood 11 are pivotably coupled to each other in a rear area H of the engine hood 11, near the cab 7 of the tractor 2.connected such that the second frame element 16 is reversibly pivotable relative to the first frame element between a first position, corresponding to a closed position of the engine hood 11, and a second position, corresponding to an open position of the engine hood 11. Parts of the engine hood 11 are therefore pivotable by means of the frame structure between the closed position, in which the engine hood 11 limits or encloses the components arranged in the engine compartment 10, and the open position, in which the engine hood 11 at least partially provides or enables access to the engine compartment 10 and the components arranged therein, and preferably lockable in each of these end positions. FIG. 1 Figure 11 shows the engine hood of tractor 2 in a closed position.

[0042] The engine hood 11 cover 12 of the tractor 2 comprises a main cover 12.1, which is supported by the second frame element 16 of the frame structure 15 and can thus pivot between the closed and open positions. The cover 12 further comprises two side covers 12.2, of which only one is shown in the figures. The side covers 12.2 are each attached to the first frame element of the frame structure 15 and / or the machine frame 3 of the tractor 2. The main cover 12.1 includes at least one recess 13.1, 13.2 in which a functional element 14, designed as a lighting device 14.1, 14.2, is arranged. The side covers 12.2 each also include at least one recess 13.3 in which a functional element 14, designed as a ventilation grille 14.3, is arranged. The main fairing 12.1 and also the side fairings 12.2 may also include further recesses 13 for the arrangement of functional elements 14, which will not be discussed in the following.

[0043] As in FIG. 2As shown, the main fairing 12.1 comprises a light bar 14.1, which is arranged in a recess 13.1, the recess 13.1 being designed to accommodate the light bar 14.1. Furthermore, the main fairing 12.1 comprises two cylindrical lighting devices 14.2, each arranged in a recess 13.2, the recesses 13.2 each being designed to accommodate a cylindrical lighting device 14.2. The recess 13.1 accommodating the light bar 14.1 and the two recesses 13.2, each accommodating a cylindrical lighting device 14.2, are arranged one above the other in the area of ​​the main fairing 12.1 that partially defines the front F of the tractor 2 and is located in a front area V of the engine hood 11, in the vehicle height direction FH.

[0044] It is essential that the cover 12 of the engine hood 11 includes at least one centering means 17 for the defined alignment and positioning of a functional element 14 in a corresponding recess 13 provided for this purpose in the cover 12. This centering means 17 is arranged on at least one inner surface 18, i.e., a surface adjacent to the engine compartment 10, of the cover 12 in the edge region R of the respective recess 13. The at least one centering means 17 serves to reliably align and position a respective functional element 14 in a corresponding recess 13 in the cover 12 of the engine hood 11, without significant effort, so that the proper functioning of the functional element 14 during operation of the tractor 2 is ensured, and an appealing visual appearance of the tractor 2 is guaranteed due to small and uniform gap widths.

[0045] Referring to the FIGS. 3 and 4The defined orientation and positioning of the light strip 14.1 in the designated recess 13.1 in the main panel 12.1 of the engine hood 11 is now described. The main panel 12.1 includes one or more fastening structures 19 on an inner surface 18.1 in the edge region R1 of the recess 13.1 for attaching the light strip 14.1 to the main panel 12.1. The fastening of the light strip 14.1 to the main panel 12.1 is therefore on the inside of the main panel 12.1, making the fastening invisible to the operator 8 from the outside. Instead, the light strip 14.1 blends seamlessly into the main panel 12.1 of the engine hood 11. Each fastening structure is designed as a cylindrical projection with a central bore for receiving a fastening element to secure the light strip 14.1 to the main panel 12.1. So that the light strip 14.1 fits into the recess 13.The main cover 12.1, which can be defined, aligned, and positioned, comprises one or more centering means 17.1. The centering means 17.1 is formed or arranged as at least one rib, preferably two opposing ribs, on a circumferential surface U1 of a respective mounting structure 19 designed as a projection. The light strip 14.1 comprises structures – not shown in the FIGS. – which cooperate with the centering means 17.1 formed on the mounting structures 19 for the defined alignment and positioning of the light strip 14.1 in the recess 13.1.

[0046] Referring to the FIGS. 5The defined alignment and positioning of the cylindrical lighting devices 14.2 in the recesses 13.2 provided for this purpose in the main panel 12.1 of the engine hood 11 is now described. The main panel 12.1 comprises one or more centering means 17.2 for the defined alignment and positioning of the cylindrical lighting devices 14.2. The centering means 17.2 are designed as a rib arranged on an inner surface 18.2 of the main panel 12.1 that defines a circumferential edge 20 of the recess 13.2. The main panel 12.1 also comprises one or more fastening structures 21 on another inner surface 18.3 in the edge region R2 of the recess 13.2 for fastening the cylindrical lighting devices 14.2 to the main panel 12.1.These mounting structures 21 are also each designed as a cylindrical projection with a central bore for receiving a fastening element for attaching the cylindrical lighting devices 14.2 to the main cover 12.1. In addition to the centering means 17.2, the main cover 12.1 includes further centering means 17.3, which are formed or arranged on a circumferential surface U2 of each mounting structure 21 designed as a projection. These centering means 17.3 are also each designed as a rib. Each cylindrical lighting device 14.2 includes a ring element 22 on which a light source arrangement (not shown in the figures) is arranged, which may include, for example, one or more lights for a parking light, a low beam, and / or a high beam. The ring element 22 includes one or more positioning means 23 designed as a rib on an outer circumferential edge 22.1.The positioning means 23 work together with the centering means 17.2 and / or the further centering means 17.3 for the defined alignment and positioning of the respective cylindrical lighting device 14.2 in the respective recess 13.2.

[0047] Referring to the FIGS. 6The defined orientation and positioning of the ventilation grille 14.3 in the recess 13.3 provided for this purpose in a respective side panel 12.2 of the engine hood 11 is now described. The side panels 12.2 of the engine hood 11 each also include one or more centering means 17.4. These centering means 17.4 are each designed as a rib arranged on an inner surface 18.4 of a respective side panel 12.2 in the edge region R3 of the recess 13.3. The ribs are preferably T-shaped, with a surface 24 of each rib, which defines the orientation and positioning of the ventilation grille 14.3, being aligned parallel to the edge 25 of the recess 13.3. In other words, the ventilation grille 14.3 is in a state arranged in the recess 13.3 with an edge area on the surface 24 of the centering means 17.4 and is thereby defined and aligned and positioned in the recess 13.3.The ventilation grille 14.3 is fastened by means of fastening structures 26 formed or arranged in the edge area R3 of the recess 13.3.

[0048] In addition to the centering means 17.4, one or more further fastening structures 27 can be formed or arranged on the inner surface 18.4 and / or on another inner surface of a respective side panel 12.2 in the edge region R4 of the side panel 12.2. Such a fastening structure 27 is, for example, in FIG. 7The fastening structures 27 serve to attach the respective side panels 12.2 to the first frame element and / or the machine frame 3 of the tractor 2. The side panels 12.2 are therefore not pivoted together with the main panel 12.1 over the frame structure 15 during an opening or closing operation of the engine hood 11. The fastening structures 27 each comprise two webs 28.1, 28.2 arranged parallel to each other on the inner surface 18.4 and / or the further inner surface. In addition to the webs 28.1, 28.2, the fastening structures 27 each comprise a fastening element 29 held or fastened by means of the webs 28.1, 28.2. The fastening element 29 comprises a retaining section 29.1 by means of which the fastening element 29 is held or fastened to the webs 28.1, 28.2. In addition to the mounting section 29.1, the fastening device 29 includes a fastening section 29.2, by means of which the fastening element 29, and thus the respective side panel 12.2, is attached to the first frame element and / or the machine frame 3 of the tractor 2. The fastening section 29.2 is preferably designed in the form of a clamp, so that the side panels 12.2 can each be detachably attached to the first frame element and / or the machine frame 3 of the tractor 2. The webs 28.1, 28.2 each comprise a raised section 30 at one end, the raised sections 30 being formed at opposite ends of the webs 28.1, 28.2. The mounting section 29.1 is partially accommodated between the webs 28.1, 28.2. To secure or fasten the mounting section 29.1 to the webs 28.1, 28.2, the orientation of the fastening element 29 relative to the webs 28.1, 28.2 is changed. In other words, the fastening element is aligned with the webs 28.1, 28.2 is positioned so that the mounting section 29.1 is partially received by the webs 28.1, 28.2. The orientation of the fastener 29 is then changed relative to the webs 28.1, 28.2, which also changes the orientation of the mounting section 29.1 relative to the webs 28.1, 28.2. After the change in orientation, which is achieved, for example, by simply rotating the fastener 29, preferably by 90°, the mounting section 29.1 comes into contact with the raised sections 30, which define stops for the mounting section 29.1, thereby securing or fastening the fastener 29 to the respective side panel 12.2 via the webs 28.1, 28.2.

[0049] In order for the engine hood 11 to withstand the loads occurring during the operation of the tractor 2, the engine hood 11 can comprise different structures 31.

[0050] For example, if, as in FIG. 2As shown, the main panel 12.1 of the engine hood 11 is partially interrupted between the recesses 13.1, 13.2, which are arranged one above the other in the vehicle height direction FH, in order, for example, to ensure a sufficiently large air supply into the engine compartment 10 via a further recess 13 formed by the interruption, a stabilizing structure 31.1 can be arranged on the inside of the main panel 12.1, bridging the interruption section by section. Such a stabilizing structure 31.1 is preferably designed such that it comprises two legs, each bridging the interruption between the recess 13.1 and a recess 13.2, as well as a strut connecting the legs. The stabilizing structure 31.1 is attached to the inside of the main panel 12.1 via the legs and the strut.1 is covered by another ventilation grille, so that the operator 8 cannot perceive the stabilizing structure 31.1 when the engine hood 11 is closed.

[0051] Furthermore, the main fairing 12.1 can include a stiffening structure 31.2 on an inner surface 18.5 in the upper area or engine hood 11, thereby increasing the stiffness of the main fairing 12.1. The stiffening structure 31.2 is preferably designed as an integral part of the main fairing 12.1. Alternatively, the stiffening structure 31.2 could also be attached as an additional component to the inner surface 18.5 of the main fairing 12.1. The stiffening structure 31.2 is designed as shown in FIG. 8The stiffening structure 31.2 is preferably shown in a rib-like form. The dimensioning of the stiffening structure 31.2 is based on the result of a calculation using a finite element method, taking into account possible load cases occurring during the operation of the tractor 2. Such load cases include, in particular, an acceleration load case, a wind speed load case, and / or a static load case, in which, for example, the operator stands on the engine hood 11 to clean the cab 7.

[0052] Finally, the main distribution can be 12.1, as also in FIG. 8As shown, a support structure 31.3 is arranged between the second frame element 16 of the frame structure and the main cladding 12.1 in the coupling area of ​​the frame elements. The support structure 31.3 is attached to both the second frame element 16 and the main cladding 12.1. The attachment is preferably achieved by screwing the support structure 31.3 to both the main cladding 12.1 and the second frame element 16. The support structure 31.3 is preferably designed as a plate-shaped element or as two plate-shaped elements and is made of a metal, preferably steel.

[0053] Finally, it should be noted that the embodiments described above serve only to describe the claimed teaching, but are by no means to be regarded as limiting or exhaustive. List of reference symbols 1 Agricultural machinery 17 Centering device 17.1 Centering device 2 tractor 17.2 Centering device 3 machine frame 17.3 Centering device 4 Soil treatment agents 17.4 Centering device 5 front axle 18 Inner surface of the paneling 6 rear axle 7 cabin 18.1 Inner surface of the main paneling 8 operator 9 Operating and control unit 18.2 Inner surface of the main paneling 10 engine compartment 18.3 Inner surface of the main paneling 11 bonnet 12 cladding 18.4 Inner surface of the side panel 12.1 Main paneling 12.2 side panel 18.5 Inner surface of the main paneling 13 Exclusion 13.1 Cutout for light strip 19 Mounting structure 13.2 Recess for cylindrical lighting device 20 edge 21 Mounting structure 13.3 Cutout for ventilation grille 22 Ring element 22.1 edge 14 Functional element 23 Positioning device 14.1 light bar 24 Surface centering device 14.2 Cylindrical lighting fixture 25 edge 26 Mounting structure 14.3 ventilation grille 27 Mounting structure 15 framework structure 28.1, 28.2 web 16 Second frame element 29 Fasteners 29.1 Mounting section H Rear area of ​​the hood 29.2 Fastening section 30 increase V Front area of ​​the hood 31 structure O Upper part of the hood 31.1 stabilization structure 31.2 stiffening structure F Front of the agricultural machine 31.3 Support structure R Edge area FL Vehicle longitudinal direction R1 to R4 Edge area Facebook Vehicle width direction U1, U2 Perimeter area University of Applied Sciences Vehicle height direction

Claims

1. An agricultural work machine (1), in particular a tractor (2), comprising an engine compartment (10) and an engine hood (11) that at least partially delimits the engine compartment (10), wherein the engine hood (11) comprises a panel (12) and a frame structure (15), wherein the frame structure (15) comprises a first frame element that is fastened at least to a machine frame (3) of the agricultural work machine (1), and a second frame element (16) that carries at least parts of the panel (12), wherein the first frame element and the second frame element (16) are pivotally coupled to one another in a rear region (H) of the engine hood (11), wherein the panel (12) comprises at least one recess (13, 13.1, 13.2, 13.3) for arranging at least one functional element (14, 14.1, 14.2, 14.3), characterized in thatthe covering (12) comprises at least one centering means (17, 17.1, 17.2, 17.3, 17.4) for the defined alignment and positioning of the functional means (14, 14.1, 14.2, 14.3) in the recess (13, 13.1, 13.2, 13.3), wherein the centering means (17, 17.1, 17.2, 17.3, 17.4) is arranged on at least one inner surface (18, 18.1, 18.2, 18.3) of the covering (12) in the edge region (R, R1, R2, R3) of the recess (13, 13.1, 13.2, 13.3).

2. Agricultural working machine (1) according to claim 1, characterized in that the covering (12) comprises a main covering (12.1) carried by the second frame element (16), which main covering comprises at least one recess (13.1, 13.2) in which at least one functional element (14.1, 14.2) designed as a lighting device is arranged.

3. Agricultural working machine (1) according to claim 2, characterized in thatthe lighting device is a light bar (14.1) and the recess (13.1) is designed to accommodate the light bar (14.1), wherein the main cover (12.1) comprises, on an inner surface (18.1) in the edge region (R1) of the recess (13.1), at least one fastening structure (19) for fastening the light bar (14.1) to the main cover (12.1), which is designed in the form of a cylindrical projection with a bore for receiving a fastening means, wherein the centering means (17.1) is designed as at least one rib arranged on a circumferential surface (U1) of the projection.

4. Agricultural working machine (1) according to claim 2 or 3 characterized in thatthe lighting device is a cylindrical lighting device (14.2) and the recess (13.2) is designed to accommodate the cylindrical lighting device (14.2), wherein the centering means (17.2) is designed as a rib arranged on an inner surface (18.2) of the main covering (12.1) defining a circumferential edge (20) of the recess (13.2).

5. Agricultural working machine (1) according to claim 4, characterized in thatthe main covering (12.1) comprises, on a further inner surface (18.3) in the edge region (R2) of the recess (13.2), at least one fastening structure (21) for fastening the cylindrical lighting device (14.2) to the main covering (12.1), which is designed in the form of a cylindrical projection with a bore for receiving a fastening means, wherein the main covering (12.1) comprises at least one further centering means (17.3) arranged on a circumferential surface (U2) of the projection, which centering means is designed as a rib.

6. Agricultural working machine (1) according to claim 4 or 5, characterized in thatthe cylindrical lighting device (14.2) comprises a ring element (22) on which a lighting device arrangement is arranged, wherein the ring element (22) comprises at least one positioning means (23) designed as a rib on an outer peripheral edge (22.1), which cooperates with the centering means (17.2) and / or the further centering means (17.3) for the defined alignment and positioning of the cylindrical lighting device (14.2) in the recess (13.2).

7. Agricultural working machine (1) according to one of claims 2 or 3 in combination with one of claims 4 to 6, characterized in that the recess (13.1) receiving the light bar (14.1) and the at least one recess (13.2) receiving the cylindrical lighting device (14.2) in the area of ​​the main fairing (12.1) defining the front (F) of the agricultural work machine (1) in the vehicle height direction (F H) are formed one above the other.

8. Agricultural working machine (1) according to claim 7, characterized in that the main panel (12.1) between the vehicle height direction (F H ) recesses (13.1,13.2) arranged one above the other, wherein a stabilising structure (31.1) bridging the interruption in sections is arranged on the inside of the main covering (12.1).

9. Agricultural working machine (1) according to one of claims 2 to 8, characterized in that the main fairing (12.1) comprises, on an inner surface (18.5) in the upper region (O) of the engine hood (11), a stiffening structure (31.2) which increases the stiffness of the main fairing (12.1), wherein the stiffening structure (31.2) is preferably designed as an integral part of the main fairing (12.1).

10. Agricultural working machine (1) according to claim 9, characterized in thatthe stiffening structure (31.2) is rib-shaped.

11. Agricultural working machine (1) according to claim 9 or 10, characterized in that the dimensioning of the stiffening structure (31.2) is based on a result of a calculation using a finite element method taking into account possible load cases occurring during operation of the agricultural work machine (1), preferably an acceleration load case, a wind speed load case and / or a static load case.

12. Agricultural working machine (1) according to one of claims 2 to 11, characterized in thata support structure (31.3) is arranged between the second frame element (16) and the main cladding (12.1) in the coupling region of the frame elements to one another, wherein the support structure (31.3) is fastened both to the second frame element (16) and to the main cladding (12.1), wherein the support structure (31.3) is preferably designed as at least one plate-shaped element, particularly preferably two plate-shaped elements.

13. Agricultural working machine (1) according to one of claims 1 to 12, characterized in that the covering (12) comprises two side coverings (12.2), which are each fastened to the first frame element and / or the machine frame (3), wherein each side covering (12.2) comprises at least one recess (13.3) in which a functional element (14) designed as a ventilation grille (14.3) is arranged.

14. Agricultural working machine (1) according to claim 13, characterized in thatthe centering means (17.4) is designed as a rib arranged on an inner surface (18.4) of a respective side panel (12.2) in the edge region (R3) of the recess (13.3), wherein a surface (24) of the rib defining the orientation and positioning of the ventilation grille (14.3) is aligned parallel to the edge (25) of the recess (13.3).

15. Agricultural working machine (1) according to claim 13 or 14, characterized in thaton an inner surface (18) of a respective side panel (12.2) in the edge region (R4) of the side panel (12.2) at least one fastening structure (27) for fastening the side panel (12.2) to the first frame element and / or the machine frame (3) is arranged, wherein the fastening structure (27) comprises two webs (28.1, 28.2) arranged parallel to one another on the inner surface and a fastening means (29) held by means of the webs (28.1, 28.2), wherein the webs (28.1, 28.2) each comprise an elevation (30) at one end, wherein the elevations (30) are formed at respective opposite ends of the webs (28.1, 28.2), wherein the fastening means (29) comprises a holding section (29.1) and a fastening section (29.2), in particular designed in the form of a clamp, wherein the holding section (29.1) is partially received between the webs (28.1, 28.2) and a securing of the holding section (29.1) on the webs (28.1, 28.2) by changing the orientation of the fastening means (29) relative to the webs (28.1, 28.2).

Images